Improvement in filters



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, 'nazam )Z255 @Euw ING'TON. D. C.

N; PELERS. PHOTD-L|THOGRAPMER, WASH *dinima ;tima

smt @mitra TAYLOR '1 THOMPSON, or CHARLESTOWN, MASSACHUSETTS, ASSIGNOR To' HIMSELF 'AND' 'LEWIS R. BRADBURY,"OF SAME PLACE.

Letters Patent No. 102,881, dated May 10, 1870.

- IMPROVEMENT IN FILTERS.

The Schedule referred to in these Letters Patent and making part of the same T0 ail to 'whom these presents shall come:

Be it known that I, TAYLOR P. THoMpsox, of Gharlestown, in the connty of Middlesex and State of Massachusetts, have made an invention of a new and useful Filter for' Straining Liqnids; and do hereby dcclare the following to be a full,` clear, and exact description thereof, due reference being had to the ac- 'companyiug drawings making part of this specification, 'and in whicha tubular` extension, one of which is formed, with a'- female-screw, for attachment to a faucet or other connection, and the' other serving as an' outlet or dischargeport, a tilting or swiveling porous disk 'being situated and confined betweenthc two cups [in such manner as to be reversed and present alternate sides tothe inrushing liquid, essentially as hercinafter explained.

In the drawings, hereinbefore mentioned as making part of this specification a and b denote two semispherical cups, the peripln. cries of which are provided alternately with a male and 'female-screw, by which they are* firmly connected toge'ther, in order to create a tiltering-chamb'er, c, the

upper cup being formed with an integral tubular ex tension, d, in the interior of which is produced a female-screw, e, in order that the instrument-may be attached to a faucet, pipe, or other connection, while the lower cup -has a similar extension, e', to permit of es# cape of liquid' passing through the filter. Within the center of the filtering-chambcr. c I dis- .pose a horizontal'flat ring, f, mounted .upon a shaft, g, which passes through one side of one cup, spams the* interior of the chamber'c, and is stepped in the opposite side thereof, as shown at h in the drawings, the outer and exposed end of said shaft being provided with a .milled head, or its equivalent', in order to partially or entirely revolve such shaft within its hearngs.

Upon one face'. of the ringf [place the 'filtering agent t, which, in the present instance, is a piece of thick felt, and upon such agent `I scrcw a secondfiat sideviews of the said ring, j, thus confining said medium between the two rings.

The size of the filter-ing agent is such as to tightly fill the interior of the device in horizontal section, and it may be freely revolved withoutdanger.

The above simple arrangement constitutes the subject-matter of my invention as embodied in this context.

The liquid entering the instrument through the; orifice d percolates or' 1s forced through the interposed porous diaphragm t', which arrests any dirt or extraneous matter which may reach it. V v r i After continued flowagc of liquid through the din:

phragm t has been. continued for some time, it is to be inverted or reverse'd, and the opposite side pre.- seuted to the inrushing water, the dirt, which may have collected upon it by this means, being dctachcd and suffered to escape through the outlet e', the milled head of the shaft q enabling the rotation of such shaft,

and, consequently, of the .filtering (liaphragm, to bc. effected readily and easily, and without necessity oi' dismembcring the instrument or deta-ching it from its connections.

Should liquid bc passing through the chamber c,

which it is not necessary or desirable to filter, as is often the case, the diaphragm is to bc partially inverted or tilted into a pcrpendicular position, as shown in fig. 2 of the drawings,`which allows of the free passage of the liquid through tho instrument, but not through thcdiap'hragm. i

It will bc apparent thatthe pcriphcry ot' t-hc case b of the diaphragm, when horizontal or at right anglcs' to the axis of the' case, tightly fills the 'chamber thus preventing passage ot' water through the instru nient, except it is omp'ellcd to' 'pass through the diaphragm, which thus; becomes its own packing. V

When the diaphragm gives out from any cause, and must'be renewed, the movahle ringj is to be detachcd and a new diaphragm substituted at trifling expense. Several advantages make themselves manifest in the adoption of my invention First, the cxceeding low cost is a matt-er of great importance. v

Second, the filter always remains in the same position, and does not require to be dctached from its connection and reversed end* for end, as in many others, the invcrsion of* the diaphragm obviating this' necessity.

Third, the case and rapidity withwhich a spent diaphragm may be renewed, and the trifling cost of a fresh one, add another argument to the value of the invention. 4

I have contemplated producing a cheap'style. of filtor by dispensin'g with the two cups-connected together,

:LS explained, and applying the reversibie dinphragm to the interior of a short pipe or cylinder, as shown in fig. 6 of the accompanying drawing&

` ('Tnims.

l claim- 1. A filter, in which a reversihie rotating diaphragin or strniner is employed, so constructed thnt the filtering agent serves both as means of filtering the liquid' passing through the instrument, and of preventing pnssnge of liquid about the eircnmferences of such fiitering agent, as herein set forth and described.

`2. A filter, composed of two cups joined at their eircnmferences, and provided with a reversible dia.- phragm or strainer, operated from the outside of the case 'of the instrument, a s herein set forthland described.

3. The combination and arrangement of the two rings f and j, shaft g, and strniner or diaphmgm i, when combined with &suitable ease, in manner and for the purpose before explained.

TAYLOR P. THOMPSON.

witnesses FEED. CURIIS, EDWARD GRIFFITH. 

